===== HB21 LIFEPO4 PRODUCT PAGE CSS (house style) ===== /.hb21-spec-wrap max-width: 1100px; margin: 0 auto 40px auto; padding: 0 20px; text-align: center;.hb21-spec-wrap h2,.hb21-spec-wrap h3,.hb21-spec-wrap p,.hb21-spec-wrap li text-align: center;.hb21-product-intro max-width: 920px; margin: 0 auto 30px auto;.hb21-product-intro h2 margin: 0 0 14px 0; font-size: 2rem; line-height: 1.2;.hb21-product-intro p margin: 0 auto 14px auto; line-height: 1.7; max-width: 900px;.hb21-spec-grid display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 30px; text-align: left;.hb21-spec-card background: #f7f7f7; border-radius: 14px; padding: 24px; text-align: left;.hb21-spec-card h3 margin: 0 0 16px 0; font-size: 1.25rem; text-align: left;.hb21-spec-card ul list-style: none; padding: 0; margin: 0;.hb21-spec-card li margin: 0 0 10px 0; line-height: 1.55; text-align: left;.hb21-spec-card strong font-weight: 700;.hb21-warranty-note margin-top: 28px; font-size: 1rem; line-height: 1.6; text-align: left;.hb21-section max-width: 1100px; margin: 0 auto; padding: 34px 20px; text-align: center;.hb21-section h2,.hb21-section h3 font-size: 2rem; line-height: 1.2; font-weight: 700; margin: 0 0 14px 0; text-align: center;.hb21-section p max-width: 900px; margin: 0 auto 14px auto; line-height: 1.65; text-align: center;.hb21-section a,.hb21-faq-item a color: #0066cc; text-decoration: underline;.hb21-footnote font-size: 0.9rem; color: #555; margin-top: 10px;.hb21-image-full max-width: 1100px; margin: 0 auto; padding: 14px 20px;.hb21-image-full img display: block; width: 100%; height: auto; margin: 0 auto; border-radius: 8px;.hb21-video-wrap max-width: 1100px; margin: 0 auto; padding: 14px 20px;.hb21-video-wrap.hb21-video-embed position: relative; width: 100%; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 8px;.hb21-video-wrap.hb21-video-embed iframe position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;.hb21-card-grid max-width: 1100px; margin: 0 auto; padding: 14px 20px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px;.hb21-card text-align: center;.hb21-card img display: block; width: 100%; height: auto; border-radius: 8px; margin-bottom: 10px; object-fit: cover; aspect-ratio: 4 / 3;.hb21-card h3 margin: 0 0 6px 0; font-size: 1.1rem; line-height: 1.3; text-align: center;.hb21-card p margin: 0; line-height: 1.5; font-size: 0.95rem; text-align: center;.hb21-card-compact h3 font-size: 0.95rem; margin-bottom: 4px;.hb21-card-compact p font-size: 0.85rem; line-height: 1.4;.hb21-faq-wrap max-width: 980px; margin: 40px auto 20px auto; padding: 0 20px; text-align: center;.hb21-faq-wrap h2 font-size: 2rem; line-height: 1.2; margin-bottom: 20px; text-align: center;.hb21-faq-item background: #f7f7f7; border-radius: 12px; padding: 18px 20px; margin-bottom: 14px; text-align: left;.hb21-faq-item h3 margin: 0 0 8px 0; font-size: 1.1rem; line-height: 1.4; text-align: left;.hb21-faq-item p margin: 0; line-height: 1.65; text-align: left; @media (max-width: 989px).hb21-spec-grid grid-template-columns: 1fr;.hb21-card-grid grid-template-columns: repeat(2, minmax(0, 1fr));.hb21-product-intro h2,.hb21-section h2,.hb21-section h3,.hb21-faq-wrap h2 font-size: 1.7rem; @media (max-width: 749px).hb21-card-grid grid-template-columns: 1fr; Overview
The BLUETTI B4810 is a 51.2V 100Ah deep-cycle battery built for the 48V systems in motorhomes, caravans, boats and off-grid cabins. It packs 5120Wh into a single slim unit that bolts down flat, with terminal connections made for permanent installs rather than grab-and-go use. Its LiFePO4 chemistry is rated for 6000 charge cycles at 70% capacity, so it is built to cycle every day for years.
One battery is rarely the end of the story. The B4810 expands in parallel, up to 24 units and 122.88kWh. The Ethernet cable in the box carries the communication link between batteries; the power cables that join the terminals are not included. It charges at up to 100A, discharges at up to 100A with a 200A peak for surge loads, and its IP65 casing and built-in self-heating handle wet lockers and cold mornings. If you're unsure how it fits your system, we're happy to help before you buy. B4810 Specs:
- Capacity: 5120 Wh (51.2 V, 100 Ah)
- Type: LiFePO4 (Lithium Iron Phosphate)
- Life Cycles: 6000 Cycles @ 70% Capacity
- Charge Current: 50 A (Recommended) 100A Max.
- Discharge Current: 100A Max.
- Peak Discharge Current: 200A @ 30s
- Cell Temperature Protection: pauses charging below -1°C or above 61°C, and discharging below -21°C or above 61°C
- Net Weight: 46 kg
- Dimensions (L × W × H): 608 × 380 × 145mm
- IP Rating: IP65
- Max. Expansion (Parallel & Series): 122.88 kWh (24P), 51.2 V, 2
